Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d0f50fbcd0c801…

MALICIOUS

PDF

38.8 KB Created: 2020-08-06 03:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e68827a790f2f28e448277e23bd5d2e5 SHA-1: 82ebc83db629ffdfbb683b27f0a41fd319fce974 SHA-256: 79d0f50fbcd0c80140f514297a5cddedb5aaab523e0cd84da334294858ad7eb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cutting+edge+advanced+third+edition+pdf
    • http://bavubo.climacusconference.org/uploads/1/3/1/4/131407995/detemevevavibovuzes.pdf
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdf
    • http://files.stgregoriosspokane.org/uploads/1/3/0/7/130775998/e23aaa.pdf
    • http://files.barefoothoofs.com/uploads/1/3/1/6/131637640/6817131.pdf
    • http://files.trialinnovations.com/uploads/1/3/0/9/130969293/zonorus_fozutemewanudad_wusuwaxejavax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/numoniwusijedutulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/movilofefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2201/files/vufodegifotit.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/munesepazifozojowoxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/co_curricular_activities_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20931566490.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/leberefubamokuvirowejiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4679/files/6937803088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15750122344.pdf
    • https://cdn.shopify.com/s/files/1/0439/8910/6846/files/79651281622.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b67.bin
fac34ca2309fdd057f7b2ba777487e7db70d7fbee8ef4263c04f40fab499b2a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B67 5172 bytes
font_01_sfnt_off00006d04.bin
84b7e5e6ba32d533a96e582f518b77b84b3a250b1cb21444c0c893d7647a57cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 9720 bytes